Henry e



(No ModeL) H. E. RUSSELL, Jr.

KNOB ATTACHMENT.

No. 326,920. Patented Spt. 22, 1885.

UNiTsn TATES HENRY E. RUSSELL, JR, OF NEWV BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELL & ERWIN MANUFACTURING COMPANY, OF SAME PLACE.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 326,920, dated September 22, 1885.

Application filed July 17, 1885.

To all whom, it may concern.-

Be it known that I, HENRY E. RUssELL, J r., of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvementsin Knob Attachments,of which the following is aspecification.

My invention relates to that class of knoblatches in which the knob is secured to the rose or escutcheon plate so as to partially revolve therein by means of lugs on the knobshank and segmental flanges on the rose or escutcheon; and the object of my invention is to so construct the parts as to prevent the knob-shank from being placed upon the spindle in a wrong position.

In the accompanying drawings, Figure 1 is a vertical section of my knob-latch partly in elevation, and also the portion of the door to which said latch is secured. Fig. 2 is an elevation showing the inner face of the rose or escutcheon plate. Fig. 3 is a perspective view of one of the knobs and a portion of the knobspindle; and Fig. 4 is an elevation of one side of the latch-case.

I prefer to make the rose A in the form of a plate, and secure two of said plates upon opposite sides of the door, as shown in Fig. 1, but,if desired,the rose may be of the ordinary round contour. By the term rose as herein used I mean the part within which the knobshank B turns. I construct this rose A with an orifice to receive the knob-shank, and two segmental flanges, a a, upon the upper and lower sides of said orifice, leaving open spaces or notches upon opposite sides between the respective ends of the flanges, as shown in Fig. 2. I form at the end of the knobshank B two lugs, b b, of a size which will pass through the opposite spaces between the ends of the flanges (t a of the rose A. The parts as thus far specifically described are all old and disclaimed. I form the knob-spindle D of a flattened or oblong form in cross-section, as shown in Fig. 3, instead of the ordinary square form, and I make the hole in the knobshank B and in the latchhub C of a corresponding form. \Vhen the spaces between the segmental flanges a a are formed upon the right and left sides of the orifice through the rose A, as shown in Fig. 2, I form the hole (No model.)

through the latch-hub C so that when viewed in side View, as in Fig. 4, and the hub is at rest, the longer diameter of said hole will be vertical, as shown. I form the hole in the end of the knob-shank B so that its longer diameter stands in the same direction as would a line drawn through the middle of both of the lugs I) b.

I have illustrated both of the knobs as secured to the rose in the same way, and such 6c is the preferred construction; but, if desired, that knob which is first secured might have a different construction, provided the knob last put in place is secured by the lugs and flanges, as described. 6'

After the latch, one rose, one knob, and the spindle are set in place. The shank of the other knob is engaged with the rose by bringing the lugs I) b back of the segmental flanges 011 the rose. The knob-shank is then slipped upon the projecting end of the spindle and the rose fastened in place,with the spaces between the segmental flanges standing at the right and left sides of the orifice through the rose. The flattened knob-spindle D stands with its broadest sides up and down, and consequently the knob-sl1ank must be placed upon the spindle, with the lugs 11 b projecting up and down respectively. The partial rotation of the hub C, as in ordinary knob-latches, is limited to less than one-quarter of a revolution either to the right or left, so that in no event can the lugs b b be turned far enough to disengage them from the flanges a (L after the rose has been secured in position. 8 5

By flattening the spindle and holes in the hub and knob-shank there are only two different positions that the knob-shank can be placed upon the spindle, either of which positions will bring the lugs b b to the top and bottom of the shank, so that there is no possibility of slipping the knob-shank upon the spindle in a wrong position. \Vith the ordinary form of square spindle, knob, and rose having the lugs and segmental flanges, there are four different positions that the knob may be slipped upon the spindle, two of which would bring the lugs into such a position that they would be disengaged from the segmental flanges.

ICC

I claim as my invention In a knob attachment, the flattened spindle D, in combination with the latch-hub having a hole of corresponding form, the rose'having 5 segmental flanges upon two sides of its orifice and the knob-shank having lugs 12 b and a flattened axial hole to receive said flattened spindle, substantially as described, and for the purpose specified.

HENRY E. .RUssELL, JR.

W'itnesses:

T. S. BISHOP, M. S. WIARD. 

